Danfoss
Danfoss Ally Radiator Thermostat
- Zigbee2MQTT / ZHA
- Local control
- Zigbee
Prices verified September 2026
See more thermostats & heating picks on our Amazon storefront →Our verdict
The trade-grade choice for anyone with legacy Danfoss valve bodies: it fits RA, RAV, RAVL and M30x1.5 threads out of the box, so older UK systems with mismatched radiators don't need creative adapter hunting. At around £49 it splits the difference between the £26 SONOFF TRVZB and the £60 Bosch Radiator Thermostat II — build quality and the two-year AA battery life (versus SONOFF's roughly six months) land closer to Bosch, though Bosch still edges it on precision (±0.5°C) and quieter running. Buy this specifically for Danfoss valve bodies or where the wide adapter range matters; otherwise the SONOFF or Bosch are simpler choices.
What can Home Assistant control on the Danfoss Ally Radiator Thermostat?
| Control | Type | What it does |
|---|---|---|
| Valve opening | Sensor (%) | Read-only valve-opening percentage reported by the climate entity — shows actual actuator position independent of the target setpoint. |
| External room sensor | Number | Writable room temperature input for binding a separate sensor into the TRV's control loop instead of relying on the head-mounted sensor. |
| Radiator covered | Switch | Toggles between Auto Offset Mode (blends internal and external readings) and Room Sensor Mode (external sensor only); requires firmware that supports the flag. |
| Load balancing | Number | Enables multi-valve coordination and accepts the room-wide mean load value, which an external automation must compute from each valve's load estimate and push periodically. |
| Mounting orientation | Select | Sets vertical/horizontal mounting orientation and triggers the mounting calibration run, required for accurate valve-position calibration after installation. |
The climate entity exposes a valve-opening percentage and running state separately from the setpoint, so you can watch actual valve position rather than inferring it from temperature deltas. External sensor binding runs through two paired attributes: a room-sensor input pushed from HA, plus a covered flag that flips the head from Auto Offset Mode (blends its own head-mounted reading with the external one) to Room Sensor Mode (external sensor drives control alone) — older firmware shipped without the covered flag at all, so it's worth confirming firmware before relying on pure external control. Load balancing isn't automatic: a room-mean load value has to be fed by a periodic automation averaging every valve's own load estimate, otherwise multiple Allys on one room simply compete for boiler capacity independently. ZHA users specifically report sluggish setpoint response because the stock ZHA quirk skips a bitmask Danfoss's spec calls for on setpoint writes — Zigbee2MQTT sends it correctly, a real point in favour of that stack for this device.
Specs
| model | 014G2460 (UK/EU variant, ships with RA, M30, RAV and RAVAL adapters); also sold as 014G2461 in Italy with Caleffi/Giacomini adapters instead |
|---|---|
| weight | 198g including batteries and RA adapter |
| batteries | 2x AA (1.5V alkaline) |
| valve fit | M30x1.5 direct; adapters included for Danfoss RA, RAV and RAVL — covers most pre-2000s UK radiator valve bodies |
| dimensions | Approx. 55mm diameter across all adapters; overall length 82-94mm depending on which adapter is fitted (94mm with the RA adapter) |
| battery life | Up to 2 years per Danfoss, with a flashing battery icon low-battery warning |
| zigbee version | Zigbee 3.0 certified |
| temperature range | 5-35°C setpoint range; 0-40°C rated ambient operating range |
How does the Danfoss Ally Radiator Thermostat compare?
| Product | From | Protocol | Local control | Integration |
|---|---|---|---|---|
| Danfoss Ally Radiator Thermostat (this product) | £49.29 | Zigbee | Yes | Zigbee2MQTT / ZHA |
| Aqara Floor Heating Thermostat W500 | £69.98 | Matter, Thread, Zigbee | Yes | Native |
| Aqara Radiator Thermostat E1 | £54.98 | Zigbee | Yes | Zigbee2MQTT / ZHA |
| Aqara Radiator Thermostat W600 | £49.99 | Matter, Thread, Zigbee | Yes | Native |
Frequently asked questions
- Does the Danfoss Ally Radiator Thermostat work with Home Assistant locally?
- Yes. The Danfoss Ally Radiator Thermostat is controlled locally in Home Assistant through Zigbee2MQTT or ZHA, so it keeps working if your internet connection or the Danfoss cloud goes down. Control and state updates stay on your own network.
- Which protocol does the Danfoss Ally Radiator Thermostat use, and do I need a hub?
- The Danfoss Ally Radiator Thermostat uses Zigbee. To pair it with Home Assistant you need a Zigbee coordinator (for example a SkyConnect/ZBT-1 or Sonoff dongle) attached to your Home Assistant host. Danfoss's own hub is not required when you integrate through Zigbee2MQTT or ZHA.
- How much does the Danfoss Ally Radiator Thermostat cost in the UK?
- The lowest price we have listed for the Danfoss Ally Radiator Thermostat is £49.29 at Underfloor Heating UK. Prices were last checked in September 2026 and change often, so confirm on the retailer's page before buying.